Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun Constriction of the pupil of the eye, resulting from a normal response to an increase in light or caused by certain drugs or pathological conditions.

from The Century Dictionary.

  • noun In cytology, the reduction-process in organisms, including mitapsis (or synapsis) and the subsequent heterotypic and homotypic divisions. This process results in reducing to one half the number of chromosomes in the nuclei. Farmer and Moore. Improperly spelled maiosis.
  • noun Used by error or substitution for myosis.
  • noun Diminution.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun Contraction of the pupil of the eye.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun (genetics) cell division that produces reproductive cells in sexually reproducing organisms; the nucleus divides into four nuclei each containing half the chromosome number (leading to gametes in animals and spores in plants)
  • noun reflex contraction of the sphincter muscle of the iris in response to a bright light (or certain drugs) causing the pupil to become smaller

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[Greek mūein, to close the eyes + –osis.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

From Ancient Greek μύειν (mūein, "to close the eyes") + -osis.

Examples

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Comments

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  • I can see it in your eye.

    How'd you lose the other one by the way?

    January 4, 2012